Imatinib TDM in GIST

August 27, 2026 updated by: Reema A. Patel

A Phase 2 Study of Imatinib Therapeutic Drug Monitoring in Gastrointestinal Stromal Tumor

Imatinib can lead to long recurrence free survival in patients diagnosed with gastrointestinal stromal tumors (GIST); however side effects can significantly hinder quality of life for our patients. This study will use therapeutic drug monitoring to improve quality of life and symptoms and assess how many patients maintain therapeutic levels. Free drug levels and pharmokinetics of imatinib will also be monitored.

Study Overview

Status

Recruiting

Conditions

Intervention / Treatment

Study Type

Interventional

Enrollment (Estimated)

28

Phase

  • Phase 2

Contacts and Locations

This section provides the contact details for those conducting the study, and information on where this study is being conducted.

Study Contact

Study Locations

  • United States
    • Kentucky
      • Lexington, Kentucky, United States, 40536
        • Recruiting
        • Markey Cancer Center
        • Contact:

Participation Criteria

Researchers look for people who fit a certain description, called eligibility criteria. Some examples of these criteria are a person's general health condition or prior treatments.

Eligibility Criteria

Ages Eligible for Study

18 years and older (Adult, Older Adult)

Accepts Healthy Volunteers

No

Description

Inclusion Criteria:

  • Histologically or cytologically confirmed GIST with KIT mutation or PDGFRA mutation (non-D842V)
  • Currently receiving imatinib initiated within the last 3 months or to be started in the next 1 month
  • Prior systemic chemotherapy for other malignancy is allowed as long as it was completed within the past 6 months and there is no evidence of disease
  • Age ≥18 years
  • ECOG performance status of 0 or 1
  • Normal organ function

Exclusion Criteria:

  • Presence of PDGFRA D842V mutation
  • Known allergy to imatinib or allergic reactions to compounds of similar chemical or biologic composition to the study drug
  • Concomitant anticoagulation with oral warfarin.
  • Use of strong inhibitors or inducers of CYP3A or CYP3A4, drugs metabolized by CYP3A4 or CYP2D6
  • Uncontrolled intercurrent illness
  • Concurrent malignancy

Study Plan

This section provides details of the study plan, including how the study is designed and what the study is measuring.

How is the study designed?

Design Details

  • Primary Purpose: Treatment
  • Allocation: N/A
  • Interventional Model: Single Group Assignment
  • Masking: None (Open Label)

Arms and Interventions

Participant Group / Arm
Intervention / Treatment
Experimental: Imatinib TDM
Patients with diagnosed gastrointestinal stromal tumor (GIST) who are currently being treated with imatinib.
Drug: Imatinib
Therapeutic drug level monitoring with plans to increase to adjust drug dosage based on levels and patient symptoms.
Other Names:
  • Gleevec

What is the study measuring?

Primary Outcome Measures

Outcome Measure
Measure Description
Time Frame
Incidence of Grade 3/4 adverse events attributable to imatinib per CTCAE v5.0
Time Frame: 6 months
To compare the incidence of Grade 3/4 adverse events attributable to imatinib per CTCAE v5.0 in patients who receive therapeutic drug monitoring (TDM) with imatinib to a historical control.
6 months

Secondary Outcome Measures

Outcome Measure
Measure Description
Time Frame
Percent of patients achieving therapeutic levels of imatinib.
Time Frame: 6 months
Percent of patients achieving therapeutic levels of imatinib.
6 months
Quality of Life based on the EORTC QLQ-C30
Time Frame: 6 months
Quality of Life will be assessed using the EORTC Core Quality of Life questionnaire (EORTC QLQ-C30). The EORTC QLQ-C30 is designed to measure cancer patients' physical, psychological and social functions. It incorporates five functional scales, three symptom scales, a global health status, financial impact, and single items assessing additional symptoms. All scales and single-item measures are transformed so that scores range from 0-100; higher scores represent a higher response level.
6 months
Average dose of imatinib required to achieve therapeutic levels and drug dose over 3 years
Time Frame: 3 year
3 year

Collaborators and Investigators

This is where you will find people and organizations involved with this study.

Sponsor

Reema A. Patel

Investigators

  • Principal Investigator: Reema Patel, MD, University of Kentucky

Study record dates

These dates track the progress of study record and summary results submissions to ClinicalTrials.gov. Study records and reported results are reviewed by the National Library of Medicine (NLM) to make sure they meet specific quality control standards before being posted on the public website.

Study Major Dates

Study Start (Actual)

March 26, 2024

Primary Completion (Estimated)

December 1, 2027

Study Completion (Estimated)

December 1, 2027

Study Registration Dates

First Submitted

August 5, 2022

First Submitted That Met QC Criteria

August 5, 2022

First Posted (Actual)

August 9, 2022

Study Record Updates

Last Update Posted (Actual)

August 31, 2026

Last Update Submitted That Met QC Criteria

August 27, 2026

Last Verified

August 1, 2026

More Information

Terms related to this study

Additional Relevant MeSH Terms

Other Study ID Numbers

  • MCC-23-GI-131

Plan for Individual participant data (IPD)

Plan to Share Individual Participant Data (IPD)?

NO

Drug and device information, study documents

Studies a U.S. FDA-regulated drug product

Yes

Studies a U.S. FDA-regulated device product

No

product manufactured in and exported from the U.S.

No

This information was retrieved directly from the website clinicaltrials.gov without any changes. If you have any requests to change, remove or update your study details, please contact register@clinicaltrials.gov. As soon as a change is implemented on clinicaltrials.gov, this will be updated automatically on our website as well.

Subscribe